Metal-working machine.



0.688.515. Patented Bob. 10, [90L '8. M. w. HANSON. METAL WORKINGMACHINE.

(Application 9164 Nov. 12, 1960.

(No Model.) 7 S h eets- -Sheet I.

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I BJLZMJmmwn' THE NORRIS Pinks co.. wuo'mumoq'wqinmamu. o. c.

Patented Dec.,|0, I901. M B. W. HANSON.

METAL WORKING MACHINE.

(Application filed Nov. 12, 1900.)

(No'M-odel.)

7 Sheets-Sheet 2.

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No. 688,5l5. Patented Dec. I0',|90l.'

' B. M. W. HANSON. METAL WORKING MACHINE.

4 (Applicatioi: filed Nov. 12, 1900.) (No Model.) 7 7 Sheetsj-Shaet 4.

- MIX/messes: Inward/07 BQJIQZMJMJLSOTL B Jag 4 No. 688,5l5. PatentedDec. l0, I901.

, B. M. W. HANSON; Y

METALWORKING MACHINE.

(In Model.)

(Application filed Nov. 12, 1900.)

' 7 Sheets-Sheet 5.

I 119 :IF' 1m 68 1 ln/ va nf/ or 1 3.Jmsm' No. 688,515. Patented Dec.10, I901.

B. M. W. HANSON. I

METAL WORKING MACHINE.

(Application filed Nov. 12, 1900.)

(No Model.)

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Np. 688,5l5.

B. m. w. Anson. METAL WORKING MACHINE.

(Application filed No'v. 12, 1900.

7 Sheets-Sheet 7.

(No Model.)

UNIT D STATES PATENT OFFICE.

w FENGT M. W. HANSON, OF HARTFORD, CONNECTICUT, ASSIGNOR TO PRATT &WHITNEY COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF NEW 'ERsEY.

METAL-WORKING MAo mE.

$BEGIIIGATION forming part of Letters Patent No. 688,515, dated December10, 1901. Application filed November 12, 1900. Serial No. 36,205. (Nomodel.)

To all whom it may concern:

Be it known that I, BENGT M. W. I-IANsON, a subject of theKing of Swedenand Norway, and a resident of Hartford, in the county of Hartford andState of Connecticut, have invented certain new and useful Improvementsin Metal-Working Machines, of Which the following is a specification.

This invention relates to an improved apparatus for milling away thespaces between the adjacent teeth of the taps or dies and similar toolsof various kinds and forms, the object being to provide ahighlyorganized and improved automatic machine which shall be efiicient,accurate, and rapid in its operation.

This invention, as herein shown and described, is embodied in a machineadapted for milling the threads of a screw-cutting tap having aparallel-sided body and a tapering end.

Figure l of the drawings is a plan view of this machine. Fig. 2 is afront View, and Fig. 3 a rearward view projected from Figs. 1 and 2.Fig. 4 is a view of the left-hand end of the machine as viewed in Figs.1 and 2. Fig. 5 is an end view insection'taken subst-ant-ially along theline 5 5 of Fig. 1. Fig. 6 is a diagrammatic View illustrating the'rnethod of setting the tap-blank in correct relation to therelieving-cam. Fig. 7 is a plan view, Fig. 8 is a rearward view, andFig. 9 an end view showing in enlarged scale the construction andarrangement of the jointed guide-bar, Fig. 7 being a section takensubstantially along the line 7 7 of Fig. 8, while in Fig. 9 a portionthereof is shown in section taken along the line 9 of Fig. 8. In Fig. 8the joint of the bar is shown in section taken through the verticalplane of its center. Fig. 10 is a plan view, and Fig. 11 aside view,showing the details of the joint for connecting the hinged andadjustable members of the guidebar. Fig. 12 is a plan view, Fig. 13 afrontview, and Fig. 14 an end viewfof the, device for connecting anddisconnecting the carriage to and from the lead-screw and for adjustingthe carriage longitudinally with relation to the screw. In Fig. 13 thecarriage is shown in section taken vertically along the plane of theaxis ofthelcad-screw, and Fig. 14: is

. drawn in transverse section taken along the line 14 14 of Fig. 12.Fig. 15 is a plan view of the cutter and its spindle, showing theirangular relation to each other and to the work.

The machine herein shown and described is of a type similar to that ofthe well-known engine-lathe, having a bed 20, provided with a head-stock21 and a foot-stock 22. This bed is provided with ways 23, upon whichthe tool-carriage 24 is fitted to slide longitudinally of the bed. Thehead-stock 21 is provided with a work-spindle 25, having a chuck 26 ofsuitable construction for gripping the work, which is herein shown to bea tap t. The spindle is connected by means of gearing with a lead-screw51, by means of which the carriage is moved longitudinally of the bed ina suitable relation to the rotations of the main spindle, so as toproduce the required spiral upon the periphery of the tap. As thecarriage is thus advanced a rotating milling-cutter mounted upon thecarriage cut-s away the intervals between the teeth, following from wingto wing of the slowly-rotating tap the spiral in which the teeth thereofare to be lo- 'cated.

In order to produce the contours required upon the difierent forms ofwork, the millingcutter is not mounted directly upon the carriage 24;but two intervening slides are provided, both of which are movablelaterally of the Work. One of these slides may be. moved under thecontrol of an adjustable guide-bar upon the rearward side of themachine, which determines the longitudinal contour of the sides of thework. The other slide, which is movable upon the tapercontrolling-slide, is also moved transversely of the work under thecontrol of a rotating cam which determines the peripheral contour of thework and which, as herein illustrated, is employed to impart a relief orclearance to the teeth of the tap t. Thus the rotating milling-cutterhaving been set to its proper depth may be moved longitudinally ofthework If under the control of the guide-bar or of the relievingcam, orboth, the work being rotated at a suitable rate, constituting thefeeding movement.

In order to economize time in the milling of tap-blank, it is desirableto provide the spindle with at least two different speeds, the slower ofwhich is employed while the milliug-cutter is at work upon each wing ofthe tap. The other speed, which may be very much faster, is employed torotate the tap more rapidly to carry the fluted interval quickly pastthe cutter and bring the next wing into engagement therewith. Thespindle 25 has fixed upon it the gear 27, which meshes with a pinion 28upon the clutch shaft 29, mounted in brackets upon the headstock. Theshaft 29 is provided with the clutch 30, which is splined upon the shaftand movable longitudinally thereof to an extent sufficient to enable itto engage with and be driven by the faster pulley 31 or the slower disk32, both of which rotate freely upon the shaft 29 excepting when engagedby the clutch 30. The disk 32 has fixed upon it the worm-wheel 33,driven by the worm 34 on the shaft 35, which has fixed upon it thepulley 36. The pulleys 31 and 36 are driven from any convenient counter-shaft at suitable speeds for imparting the desired rate of feed to therotating work. The operations of the clutch are controlled by the cam 38on the sleeve 37, which engages with the arm 41 on the rock-shaft 42,mounted transversely in the bed 20. At its rearward end the shaft isprovided with an arm 43, which is connected by means of the link 44 withthe clutch-actuating device. (Best shown in Fig. 3.) Inasmuch as theclutch 30 is the medium whereby movement is communicated to all parts ofthe machine, including the clutch-operating device itself, it is obviousthat the machine will stop as soon as the clutch 30 is withdrawn fromthe pulley 31 or the disk 32 by the operation of the cam 38 and beforethe latter will have moved the clutch into engagement with the oppositedriving member. Therefore means must be provided independently of itsown continued movement for carrying the clutch 30 from the disk 32 tothe pulley 31, and vice versa; hence the provision shown in Fig. 3. Thisconsists of a plunger 45,which is fitted to slide longitudinally uponthe arm 46, pivotally mounted upon the bed 20. A spring 47 is interposedbetween the pivot of the arm and the plunger 45 to press the latteroutwardly to the position shown in Fig. 3 against a suitable stop 48.The upper end of this plunger is beveled or inclined upon both sides andengages with a similarly-shaped end of the clutch-lever 49, which ispivotally mounted upon the head-stock and has the usual forkedextensions for engaging with an annulargroove of the clutch 30. When itis desired to move the clutch from the position shown in that figure,the plunger 45 is moved toward the left by the cam 38, the inclinedengaging ends of the plunger and the clutchlever 49 causing the formerto slide inwardly toward the pivot of its arm 46 against the pressure ofthe spring 47 until the end of the plunger passes by the end of theclutch-lever,

when the spring forces the plunger up on the opposite or left side ofthat lever, thereby forcing it toward the right and carrying the clutchaway from the disk 32 into engagement with the pulley 31, where itremains until the interval between the wings of the taps has been fedpast the cutter and the succeeding wing nearly brought into engagementtherewith, when the cam 38 moves the plunger 45 back to the positionshown in Fig. 3, thereby again bringing into operation the slower feed.Thus by the operation of its cam 38 the clutch may be moved into drivingengagement with the faster pulley 31 or with the slower worm-Wheel disk32, being herein shown in engagement with the latter, so as to drive thework-spindle 25 at the slower of the two feeds, the cutter being shownin the operation of milling across one of the wings of the tap i. Assoon as the wing has left the cutter the clutch is moved by the cam 38,so as to carry the intervalor flute between the wings rapidly past thecutter and bring the succeeding wing into engagement.

The cam-sleeve 37 is provided with a pinion 39, which is connected bygearing, as best shown in Figs. 1, 4, and 6, with the main spindle 25.In order to enable the machine to operate upon the taps and similar workhaving different numbers of wings, suitable change-gears are providedand are employed exactlylike the change-gears of the ordinaryenginelathe. The lead-screw 51 is similarly geared from the mainspindle, as indicated by the dot-and-dash pitch-circles in Fig. 4, thechanges in pitch of the taps being made by the use of change-gears,asabove described, in connection with the cam-sleeve 37. The lead-screw ismounted at its ends in the bed 20 and engages with the tool-carriage 24by means of a detachable and adjustable nut, (illustrated in Figs. 12,13, and 14,) the details of which will be hereinafter fully described.The carriage 24 is provided with an apron 55, which carries a hand-wheel56, connected by suitable gearing with a rack 57, fixed to the bed 20,wherebythe carriage may readily be detached from its lead-screw 51 andbe moved by hand longitudinally of the bed.

The milling-cutter c is fixed upon or integral with a cutter-spindle 60,which is mounted to rotate in a swinging bracket 61, pivotally mountedupon the cross feed-slide, as best shown in Fig. 5, the axis ofoscillation being in the plane of the work-spindle. This is to enablethe plane of the milling-cutter to be adjusted to the angle of thespiral to be cut. The bracket is mounted upon the pivot-shaft 63, whichis supported by the cross feed-slide 62, and the bracket, which forconvenience of drawing is herein shown to be in a hori zontal position,may be secured at any desired angle above or below that horizontal bymeans of the clamping-bolt 64, passing through an extension of the crossfeed-slide. The cutter-spindle is rotated by means of the pulley 66,driven by a belt from any convenient vergence of the spindle 60.

shaft 7 3, carried by the taper slide.

counter-shaft, and the spindle is arranged at a considerable angle withthe axis of the workspindle, as shown in Fig. 1, so as to enable thepulley thus to be mounted directly upon the cutter-spindle, and yetclear the foot-stock and the work. The general contour of the teeth ofthe cutter is made at a similar angle with the plane of the cutter, soas to' bring the said contour into the desired relation to the work, andthus allow for the angular di- This angular divergence should not exceedthat of the side of the teeth to be milled, and should preferably besomewhat less in order to allow of the use of a cutter having its teethsomewhat inclined to the annular face of the cutter, so as to allow of asuitable peripheral clearance forthe proper working of the teeth. Forexample, the machine herein illustrated is de signed to mill the teethof taps in accordance with the United States standard, the sides ofwhich form an angle of sixty degrees with the axis of the tap. Thereforethe spindle herein shown is represented as being at an angle a ofsomewhat less than thirty degrees with the axis of the tap andwork-spindle, so that the cutting-face upon the left-hand or front faceof the cutter shall be at a slight angle 6 with the annular facethereof, as shown in Fig. 15, thereby allowing of a slight peripheralclearance for the teeth on that face.

The cross feed-slide is fitted to slide transversely on therelieving-slide 70, and in order to enable the cutter to be accuratelyadjusted to depth an adjusting-screw 67 is provided between therelieving-slide and the cross feedslide, as best shown in Fig. 5, thescrew being provided with a knob 68, which is graduated to enable theoperator to adjust the feed-slide to a definite or predetermined extent.The relieving-slide 70 is mounted upon the taper slide 71 provisionbeing made for a slide movement upon the latter under the control of therelieving-cam 72, which is mounted upon the cam- The contact between therelieving-slide and its cam 72 is preferably made by means of a roller74, which is carried upon the slide, the latter being yieldingly heldinto engagement with the cam by means of the springs 75, which abutagainst a shoulder of the slide 71. The cam 72 is employed only when thedistance between the cutter and the axis of the tap is to be changedduring the rotation of the latter, or, in other words, when theperipheral contour of the cut is not to be a true circle.

'lVhen a circular contour is desired, the cam The taper slide 71 ismounted upon the carriage 24. and is moved transversely thereto duringthe operation of milling tapering portions of the tap, carrying theshaft 73 transversely'with it, and thereby moving it out of alinement atsuch times with the connectingshaft 40, by which it is driven. In orderto allow for this relative lateral displacement of the two shafts, theyare connected by means of a coupling 76, which is provided upon itsopposite sides with driving abutments or ribs 77 and 78, arranged atsubstantially right angles to each other and engaging with correspondingtransverse grooves in the adjacent faces of the disks 79 and 80, securedto the shafts 40 and 73, respectively. The right.- hand end of the shaft40 is journaled in the carriage 24: and moves longitudinally therewith,the opposite end of the shaft sliding through the splined sleeve 37, towhich the driving-pinion 39 and the cam 38 are secured. The transversemovements of the taper slide 71 with relation to the carriage 24 areconcontrolled by a guide-bar on the rearward side of the machine,comprising two or more members or sections and 86, which are supportedupon a bracket 87 and secured to the bed 20 by means of one or moreclampingbolts 88, as best shown in Fig. 5, so that it may readily bemoved longitudinally of the bed to bring the diEerent guide-bar sectionsor their joints into any desired relation longitudinally of the tap inaccordance with the desired location of the tapers or other contours tobe made thereon. In the arrangement herein shown the guide-bar 85 isfixed in parallel relation to the axis of the tap,'so that the taperslide is not moved relative to the carriage while under the control ofthis section of the guide-bar. ,The bar 86 is herein shown to be swungat an angle to the line of movement of the carriage corresponding withthe angle between the tapering side of the tap tand the axis thereof, sothat the taper slide when controlled by this section of the guidebar ismoved laterally thereby as it is moved along by the carriage, thusserving to impart the required taper to the tap. One side, as 90, of theguide-bars 85 and S6 is adopted as the controlling surface, and thetaper slide is provided with an abutment, preferablya roll 91, forengaging with that surface. The joints in the bar are located with theiraxes in the plane of the surface 90, so that the continuity of thatsurface is not broken by the angularadj ustment of the bars upon theirconnecting-joints. The preferred construction and arrangement of thejoints of the guide-bar are best shown in Figs. 7 to 11, inclusive. Thebracket 87 is provided with a circular recess for receiving thesegmental joint members 92 and 93, which projectfrom the bar-sections 85and 86, respectively, and may be attached thereto or be integraltherewith; but for convenience in construction they are preferably madein separate pieces (best shown in Figs. 10 and 11) and are set in,

means of screws and dowels.

corresponding segmental recesses in the adjacent ends of theirrespective bar-sections, each segment being attached to its bar by Thesesegments are located in a concentric relation to the intersection of theguiding-surfaces 90 of the bars and 86, so that when the segments aredropped into their circular recess in the bracket 87 the latter retainsthe ends of the bars in proper pivotal position while allowing them toswing freely, as upon a hinge. As a means for clamping the jointed endsof the bar in place they are provided with a clampbolt 91, which islocated in the counterbored hole 95 concentric with the joint of thebars. This bolt extends downwardly from the bracket 87 and is providedwith a clampingnut 96, by means of which the joints are securelyclamped. The outer ends of the bars may be provided with graduations tofacilitate the setting of the bar, which may then be clamped to place bythe bolt 97 and nut 98.

In order to cause the taper slide to accurately follow the controllingside of the guide-bars and to prevent loss of movement through loosenessor wear in the connections, a take-up device is provided comprising aslide 102, mounted on the slide 71 and abutting against the guidebar,preferably by means of a roll 101, in a direction opposite to that ofthe abutment 91 of the slide 71, as shown in Figs. 1 and 5. The slide isprovided with a spring 103, abutting against the slide 71, which servesto press the rolls firmlyinto contact with the opposite sides of theguidebar. This arrangement also allows the rolls to separate slightly,as they must when engaging with an inclined guide-bar.

The tap-blanks are preferably fluted longitudinally to form the wings orlands of the tap before placing them in this machine. In the case oftaps which are to be relieved or which require the employment of the cam72 for this or any similar purpose it is obviously necessary to placethe fluted blanks in the machine in a particular rotary relation to therelieving-cam 72. To this end provision is made, as illustrated in Fig.6, for locking the said cam at a definite and uniform rotary positionwhile the successive blanks are being inserted in the chuck. The blanksare similarlyset to a uniform rotary position by means of a gage 106,which is held in a chuck 107, fitted upon a bar 108, which extends froma boss 109 on the foot-stock 22, the bar being clamped in the boss withsufficient friction to retain it where it is placed. The gage 106 isadjustable lengthwise in its chuck, and the latter is. adjustablelongitudinally in the boss by means of its bar 108. During the settingoperation the cam-shaft 4:0 is locked in position against rotarymovement by means of the latch 110, which is pivotally mounted upon thecarriage so as to engage with a notch 111 in the edge of the disk 79. Insetting the tap to position it is turned until the face of one of itswings rests against the end of the gage. The chuck is then grippedtightly upon the shank of the tap, after which the gage is swung up outof the way until required for the setting of the next tap. The latch 110when arranged as shown need not be swung out of place by the operator,as it will be carried out by the rotary movement of the disk 79 when thelatter is started.

In milling taps of ordinary length and construction the outer end issupported by means of a dead-center 114, which is mounted in thefoot-stock 22 and which is moved by means of its adjusting-screw 115,being clamped to place after adjustment in any convenient way. Where itis desired to mill stay-bolt and similar taps having an extended shankor reamer portion, the center 114 may be removed and a bushingsubstituted for encircling and supporting the tap as close as possibleto the milling-cutter. For long taps it is sometimes desirable to employthe back-rest 118, (shown in Fig. 6,) which extends from and is clampedin the hub 119 on the foot-stock 22. This construction allows theback-rest to be adjusted to any desired position longitudinally of thetap and to be swung into and out of opera tive position.

In order to facilitate the operations of the machine, the carriage 24:is connected with its lead-screw 51 by means of a divided nut, which maybe readily disconnected by the operator and by means of which thecarriage may also be readily adjusted longitudinally of the bed, so asto bring the cutter into accurate register with the teeth of the tapwhen it is desired to reset a tap that has been partly out or for anyother reason. This device, as best shown in Figs. 12, 13, and 1t,consists of a casing 121, which is mounted upon the carriage 24 and isadjustable thereon longitudinally of the lead-screw by means of thescrew 122, being clamped to its desired position by means of theclamp-screw 123. The casing extends downwardly and encompasses thelead-screw 51 and forms abearing for the nut, which consists of the twoparts 124: and 125, which are adjusted in the casing 121 toward and fromeach other suificiently to enable them to be connected with anddisconnected from the lead-screw 51 by means of the screw 126, the endof which is journaled in the upper half-nut 125, while the threadedportion passes through a nut 127, attached to the lower half-nut 121.These nuts are free to move or float vertically, the downward movementof the lower nut being stopped by its contact with the bottom of thecasing at 128, while the upward movement of the upper nut is limited bythe heads of the screws 129, which project into the pathway of thehalf-nut 125. Thus either half of the nut when it reaches the limit ofits movement reacts upon the other half until both are moved againsttheir respective stops and are thus clear of the threads of thelead-screw. A cover 130 is preferably attached to the casing in order toexclude dirt from the half-nuts.

The operation of the machine is as follows: Assumingitto be set tomillingthe five-winged right-handed tap shown in the figures, in whichcase the cams 38 and 72 are geared to make five rotations while thework-spindle makes one, the carriage is disconnected from the lead-screwby means of thescrew 126 and is moved along the the bed by means of thehand-wheel 56 far enough to bring the cutter clear of the right-hand endof the blank, which is then inserted in the chuck 26. The main spindleis rotated far enough to bring the disk 79 to the position shown in Fig.6, so as to enable the latch 110 to be thrown into the notch 111, thuslocking the cam-shaft. The gage having been previously set to therequired position is then swung down, and the tap-blankis turned so asto bring the face of one of its wings up against the end of the gage, asshown in Fig. 6, and is gripped in this position, the wings being thusestablished in correct relation to the relieving-cam 72. Thesetting-gage 106 is then swung out of the way, the dead-center or othermeans for supporting the outward end of the tap is adjusted to position,and the back-rest 118, if required, is adjusted to place. The carriageis then moved by hand far enough to bring the cutter almost into contactwith the work. The divided nuts are then closed upon the lead-screw, theeountershaft orother driving means is set in motion, and the cut terbegins its work upon the tap, which is thus completing the cycle ofspeed changes. 7

This cycle is repeated for each wing and interval of the tap, and thecutter thus works its way along its spiral path across the succeedingwings of the tap until it reaches the end, when the completed tap isremoved and another blank is inserted, as before. The adjustment of thecutter by means of its feedslide 62 and of the taper guide-bars will bealready understood from the description hereinbefore given, and afterthey are once set for a given size and style of tap it will ordinarilybe unnecessary to readjust them, .excepting when the cutter is reground.

The sections and 86 of the guide-bar may either be straight, as hereinshown, or they may be curved in any desired contour. Any desired numberof these bars, both straight and curved, may also be connected as hereinshown.

An important advantage resides in the multiple relation borne by therotations of the clutch-cam 3S and the relieving-cam 72 to one rotationof the work-spindle 25, inasmuch as the desired successions, series, orcycle of movement desired for each wing or lobe of the Work may be laidout or arranged entirely rying spindle, means for imparting changedspeeds to the said spindle, and a cam for controlling the speed-changingmeans, shaped to produce a complete cycle of changes of speed of thework-spindle at each rotation of the cam.

2. The combination of a rotating work-carrying spindle, a cam, geared tomake a plurality of rotations for each rotation of the work-spindle andmeans controlled by the said cam for successively applying a cycle ofdiffering rotative speeds to the work-spindle, at each rotation of thecam.

3. The combination of a rotating work-carrying spindle, a cam and meanscontrolled thereby for imparting a cycle of different rotative speeds tothe work-spindle and changegearing intermediate the spindle and the cam,for changing their ratios of rotation.

4. The combination of a rotating work-earrying spindle, a plurality ofdriving devices for imparting different rates of speed to the saidspindle, a clutch for making the driving connection between the spindleand either of said driving devices, a rotating cam for operating theclutch to produce the required cycle of changes, and change-gearingintermediate the work-spindle and the cam for changing their ratios ofrotation.

5. In a machine of the class specified, in combination with means forsupporting and rotating a'tap at different speeds, a tool-slide movablelaterally of the tap, a cam geared to make a complete rotation for eachwing and interval of the tap, and arranged to impart the requiredlateral movements of the slide.

6. In a machine of the class specified, the combination of means forsupporting and rotating-a tap at different speeds, a tool-slide arrangedto move laterally of the tap, a cam for imparting and repeating therequired lateral movements of the slide at each wing of the tap, a camfor controlling the changes of speed in the tap-rotating devices, andgearing for imparting a plurality of rotations to the cams, for eachrotation of the tap, corresponding with the number of wings therein.

7. A jointed guide-bar having the axis of its joint coincident with theintersection of the guiding-surface of the bar.

too

S. In combination with the members of a jointed guide-bar; segmentaljoint members having a common axis which is coincident with theintersection of the guide-faces of the bar members.

9. In combination with the members of a jointed guide-bar, each memberbeing provided with a segmental joint member having a common axislocated in coincidence with the intersections of the guide-face of thebar, a bracket provided with a circular recess for receiving the saidsegmental members, and thereby maintaining the bar members in theirproper hinged relation.

10. A jointed guide-bar having a segmental recess in each of theadjacent ends of the joined members, the recesses being concentric withthe intersection of the guiding-faces of the bar, and a bracket providedwith a circular recess for receiving the said segmental members, andthereby maintaining the bar members in their proper hinged relation.

11. In combination with an angularly-adjustable guide-bar, atool-carriage having an abutment bearing against a guiding-surface ofthe bar, and a resiliently-yielding takeup, movable with the carriage,and bearing against the bar, to prevent lost motion and to allow of theangular adjustment of the bar.

12. In combination with ajointed and angularly-adjustable guide-bar, atool-carriage having an abutment bearing againstthe guidingsnrface ofthe bar, and a resiliently-yielding take-up movable with the carriage,and bearing against the bar, permitting of the adjustment of thedifferent members of the bar, to difierent angular positions, and toprevent lost motion between the guide-bar and the tool-carriage.

13. In combination with a jointed, angularly-adjustable guide-bar, atool-carriage having an abutment bearing against the guiding-surface ofthe bar, a take-up mounted on the tool-carriage, and means, as a spring,for resiliently pressing the take-up against the bar.

14. In combination with a guidc-barhaving members adjustable todiiferent angular positions, a tool-slide having an abutmentforbearingin one direction against the bar, and having a yielding abutment forbearing in the opposite direction against the bar, whereby the slide isadapted to follow the angles and sinuosities of the bar, without lostmotion.

15. In combination with a movable carriage and a lead-screw therefor, acasing mounted upon the carriage and adjustable thereon, 1ongitudinallyof the lead-screw, a screw for thus adjusting the casing, a divided nutconsisting of two sections mounted in the casing and movabletransversely of the lead-screw, and a screw mounted upon and carriedwith the nut-sections for opening and closing them upon the lead-screw.

16. A divided-nut device for lead-screws comprising a casingencompassing the leadscrew, divided nut-sections mounted in the casing,and a screw, journaled on and connectingthenut-sections independently ofthe casing.

17. In combination with a movable carriage, and a lead-screw therefor, acasing mounted upon the carriage and adjustable longitudinally of thefeed-screw, means for thus adjusting the casing and for clamping it inits adjusted positions, divided nut-sections mounted in the casing, anda screw journaled on and connecting the nut-sections independently ofthe casing.

18. In a machine of the class specified, in combination with the mainspindle, and a cam operatively connected therewith, means for lockingthe cam-shaft at a predetermined position, and an adjustable gage fordetermining the correct setting of the work in proper relation to thecam-shaft.

19. In a machine of the class specified, in combination with thework-spindle, a cam operatively connected therewith, a latch for lockingthe cam at a predetermined relative position, an adjustable gage forlocating a wing of the work in proper rotary relation to the locked cam,and a supporting-bar for the gage, mounted for adjustment, relative tothe work.

Signed at Hartford, Connecticut, this 8th day of November, 1900.

B. M. W. HANSON.

Witnesses:

CARRIE M. BRECKLE, WM. H. HONISS.

